Finding the Third Proportional to 343,239 and 745,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   343,239 : 745,528.50 = 745,528.50 : x
2. Step 2: Convert to fraction form
   343,239/745,528.50 = 745,528.50/x
3. Step 3: Cross multiply
   343,239x = 745,528.50 × 745,528.50
4. Step 4: Simplify right side
   343,239x = 555,812,744,312.25
5. Step 5: Solve for x
   x = 555,812,744,312.25/343,239
6. Step 6: Final answer
   x = 1,619,316.99